沖擊功 Akv (J)≥25,沖擊韌性值 αkv (J/cm2)≥98(10)
沖擊功 Akv (J)≥25,沖擊韌性值 αkv (J/cm2)≥98(10)
化學成分
碳C 0.37~0.44
硅Si 0.17~0.37
錳Mn0.50～0.80
硫S 允許殘余含量≤0.025
磷P 允許殘余含量≤0.025
鉻Cr 0.60～0.90
鎳Ni 1.25～1.65
銅Cu 允許殘余含量≤0.025
鉬Mo0.15～0.25
20CrMnTiH 20CrMnTiAH 20CrNi3H 20CrNi3AH 12Cr2Ni4H 12Cr2Ni4AH 20CrNiMoH 20CrNiMoAH 20CrNi2MoH 20CrNi2MoAH
5易切削鋼
Y12 Y12Pb Y15 Y15Pb Y20 Y30 Y35 Y40Mn Y45Ca
